Hi, Thank you for the patch! Yet something to improve: [auto build test ERROR on v5.9] [also build test ERROR on 7fe10096c1508c7f033d34d0741809f8eecc1ed4] [cannot apply to pci/next next-20201016] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/daire-mcnamara-microchip-com/PCI... base: bbf5c979011a099af5dc76498918ed7df445635b config: ia64-randconfig-r005-20201020 (attached as .config) compiler: ia64-linux-gcc (GCC) 9.3.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://github.com/0day-ci/linux/commit/61db256fdf4b495d7356b8380f6cd56bb... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review daire-mcnamara-microchip-com/PCI-microchip-Add-host-driver-for-Microchip-PCIe-controller/20201012-185923 git checkout 61db256fdf4b495d7356b8380f6cd56bb73ad8a1 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=ia64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): In file included from arch/ia64/include/asm/pgtable.h:154, from include/linux/pgtable.h:6, from arch/ia64/include/asm/uaccess.h:40, from include/linux/uaccess.h:9, from arch/ia64/include/asm/sections.h:11, from include/linux/interrupt.h:20, from arch/ia64/include/asm/hw_irq.h:10, from include/linux/irq.h:576, from include/linux/irqchip/chained_irq.h:10, from drivers/pci/controller/pcie-microchip-host.c:15: arch/ia64/include/asm/mmu_context.h: In function 'reload_context': arch/ia64/include/asm/mmu_context.h:137:41: warning: variable 'old_rr4' set but not used [-Wunused-but-set-variable] 137 | unsigned long rr0, rr1, rr2, rr3, rr4, old_rr4; | ^~~~~~~ drivers/pci/controller/pcie-microchip-host.c: At top level: 530 | .probe = pci_host_common_probe, | ^~~~~~~~~~~~~~~~~~~~~ | pci_host_probe vim +530 drivers/pci/controller/pcie-microchip-host.c 528 529 static struct platform_driver mc_pcie_driver = { 531 .driver = { 532 .name = "microchip-pcie", 533 .of_match_table = mc_pcie_of_match, 534 .suppress_bind_attrs = true, 535 }, 536 }; 537 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org